private bool AreBoundsValid(ref MilRectD bounds)
{
if (IsEmpty())
{
return(false);
}
unsafe
{
Debug.Assert((_data != null) && (_data.Length >= sizeof(MIL_PATHGEOMETRY)));
fixed(byte *pbPathData = _data)
{
MIL_PATHGEOMETRY *pGeometry = (MIL_PATHGEOMETRY *)pbPathData;
bool areBoundsValid = (pGeometry->Flags & MilPathGeometryFlags.BoundsValid) != 0;
if (areBoundsValid)
{
bounds = pGeometry->Bounds;
}
return(areBoundsValid);
}
}
}
private static PathGeometryData MakeEmptyPathGeometryData()
{
PathGeometryData data = new PathGeometryData();
data.FillRule = FillRule.EvenOdd;
data.Matrix = CompositionResourceManager.MatrixToMilMatrix3x2D(Matrix.Identity);
unsafe
{
int size = sizeof(MIL_PATHGEOMETRY);
data.SerializedData = new byte[size];
fixed(byte *pbData = data.SerializedData)
{
MIL_PATHGEOMETRY *pPathGeometry = (MIL_PATHGEOMETRY *)pbData;
// implicitly set pPathGeometry->Flags = 0;
pPathGeometry->FigureCount = 0;
pPathGeometry->Size = (UInt32)size;
}
}
return(data);
}
private void CacheBounds(ref MilRectD bounds)
{
unsafe
{
Debug.Assert((_data != null) && (_data.Length >= sizeof(MIL_PATHGEOMETRY)));
fixed(byte *pbPathData = _data)
{
MIL_PATHGEOMETRY *pGeometry = (MIL_PATHGEOMETRY *)pbPathData;
pGeometry->Flags |= MilPathGeometryFlags.BoundsValid;
pGeometry->Bounds = bounds;
}
}
}
internal void SetDirty()
{
if (!IsEmpty())
{
unsafe
{
Debug.Assert((_data != null) && (_data.Length >= sizeof(MIL_PATHGEOMETRY)));
fixed(byte *pbPathData = _data)
{
MIL_PATHGEOMETRY *pGeometry = (MIL_PATHGEOMETRY *)pbPathData;
pGeometry->Flags &= ~MilPathGeometryFlags.BoundsValid;
}
}
}
}
internal bool IsEmpty()
{
if ((SerializedData == null) || (SerializedData.Length <= 0))
{
return(true);
}
unsafe
{
fixed(byte *pbPathData = SerializedData)
{
MIL_PATHGEOMETRY *pPathGeometry = (MIL_PATHGEOMETRY *)pbPathData;
return(pPathGeometry->FigureCount <= 0);
}
}
}
internal bool HasGaps()
{
// IsEmpty() calls ReadPreamble()
if (IsEmpty())
{
return(false);
}
unsafe
{
Invariant.Assert((_data != null) && (_data.Length >= sizeof(MIL_PATHGEOMETRY)));
fixed(byte *pbPathData = (this._data))
{
MIL_PATHGEOMETRY *pPathGeometryData = (MIL_PATHGEOMETRY *)pbPathData;
return((pPathGeometryData->Flags & MilPathGeometryFlags.HasGaps) != 0);
}
}
}
public override bool IsEmpty()
{
ReadPreamble();
if ((_data == null) || (_data.Length <= 0))
{
return(true);
}
unsafe
{
Invariant.Assert((_data != null) && (_data.Length >= sizeof(MIL_PATHGEOMETRY)));
fixed(byte *pbPathData = _data)
{
MIL_PATHGEOMETRY *pPathGeometry = (MIL_PATHGEOMETRY *)pbPathData;
return(pPathGeometry->FigureCount <= 0);
}
}
}
internal static void ParsePathGeometryData(PathGeometryData pathData, CapacityStreamGeometryContext ctx)
{
if (pathData.IsEmpty())
{
return;
}
unsafe
{
int currentOffset = 0;
fixed(byte *pbData = pathData.SerializedData)
{
// This assert is a logical correctness test
Debug.Assert(pathData.Size >= currentOffset + sizeof(MIL_PATHGEOMETRY));
// ... while this assert tests "physical" correctness (i.e. are we running out of buffer).
Invariant.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_PATHGEOMETRY));
MIL_PATHGEOMETRY *pPathGeometry = (MIL_PATHGEOMETRY *)pbData;
// Move the current offset to after the Path's data
currentOffset += sizeof(MIL_PATHGEOMETRY);
// Are there any Figures to add?
if (pPathGeometry->FigureCount > 0)
{
// Allocate the correct number of Figures up front
ctx.SetFigureCount((int)pPathGeometry->FigureCount);
// ... and iterate on the Figures.
for (int i = 0; i < pPathGeometry->FigureCount; i++)
{
// We only expect well-formed data, but we should assert that we're not reading
// too much data.
Debug.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_PATHFIGURE));
MIL_PATHFIGURE *pPathFigure = (MIL_PATHFIGURE *)(pbData + currentOffset);
// Move the current offset to the after of the Figure's data
currentOffset += sizeof(MIL_PATHFIGURE);
ctx.BeginFigure(pPathFigure->StartPoint,
((pPathFigure->Flags & MilPathFigureFlags.IsFillable) != 0),
((pPathFigure->Flags & MilPathFigureFlags.IsClosed) != 0));
if (pPathFigure->Count > 0)
{
// Allocate the correct number of Segments up front
ctx.SetSegmentCount((int)pPathFigure->Count);
// ... and iterate on the Segments.
for (int j = 0; j < pPathFigure->Count; j++)
{
// We only expect well-formed data, but we should assert that we're not reading too much data.
Debug.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_SEGMENT));
Debug.Assert(pathData.Size >= currentOffset + sizeof(MIL_SEGMENT));
MIL_SEGMENT *pSegment = (MIL_SEGMENT *)(pbData + currentOffset);
switch (pSegment->Type)
{
case MIL_SEGMENT_TYPE.MilSegmentLine:
{
// We only expect well-formed data, but we should assert that we're not reading too much data.
Debug.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_SEGMENT_LINE));
Debug.Assert(pathData.Size >= currentOffset + sizeof(MIL_SEGMENT_LINE));
MIL_SEGMENT_LINE *pSegmentLine = (MIL_SEGMENT_LINE *)(pbData + currentOffset);
ctx.LineTo(pSegmentLine->Point,
((pSegmentLine->Flags & MILCoreSegFlags.SegIsAGap) == 0),
((pSegmentLine->Flags & MILCoreSegFlags.SegSmoothJoin) != 0));
currentOffset += sizeof(MIL_SEGMENT_LINE);
}
break;
case MIL_SEGMENT_TYPE.MilSegmentBezier:
{
// We only expect well-formed data, but we should assert that we're not reading too much data.
Debug.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_SEGMENT_BEZIER));
Debug.Assert(pathData.Size >= currentOffset + sizeof(MIL_SEGMENT_BEZIER));
MIL_SEGMENT_BEZIER *pSegmentBezier = (MIL_SEGMENT_BEZIER *)(pbData + currentOffset);
ctx.BezierTo(pSegmentBezier->Point1,
pSegmentBezier->Point2,
pSegmentBezier->Point3,
((pSegmentBezier->Flags & MILCoreSegFlags.SegIsAGap) == 0),
((pSegmentBezier->Flags & MILCoreSegFlags.SegSmoothJoin) != 0));
currentOffset += sizeof(MIL_SEGMENT_BEZIER);
}
break;
case MIL_SEGMENT_TYPE.MilSegmentQuadraticBezier:
{
// We only expect well-formed data, but we should assert that we're not reading too much data.
Debug.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_SEGMENT_QUADRATICBEZIER));
Debug.Assert(pathData.Size >= currentOffset + sizeof(MIL_SEGMENT_QUADRATICBEZIER));
MIL_SEGMENT_QUADRATICBEZIER *pSegmentQuadraticBezier = (MIL_SEGMENT_QUADRATICBEZIER *)(pbData + currentOffset);
ctx.QuadraticBezierTo(pSegmentQuadraticBezier->Point1,
pSegmentQuadraticBezier->Point2,
((pSegmentQuadraticBezier->Flags & MILCoreSegFlags.SegIsAGap) == 0),
((pSegmentQuadraticBezier->Flags & MILCoreSegFlags.SegSmoothJoin) != 0));
currentOffset += sizeof(MIL_SEGMENT_QUADRATICBEZIER);
}
break;
case MIL_SEGMENT_TYPE.MilSegmentArc:
{
// We only expect well-formed data, but we should assert that we're not reading too much data.
Debug.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_SEGMENT_ARC));
Debug.Assert(pathData.Size >= currentOffset + sizeof(MIL_SEGMENT_ARC));
MIL_SEGMENT_ARC *pSegmentArc = (MIL_SEGMENT_ARC *)(pbData + currentOffset);
ctx.ArcTo(pSegmentArc->Point,
pSegmentArc->Size,
pSegmentArc->XRotation,
(pSegmentArc->LargeArc != 0),
(pSegmentArc->Sweep == 0) ? SweepDirection.Counterclockwise : SweepDirection.Clockwise,
((pSegmentArc->Flags & MILCoreSegFlags.SegIsAGap) == 0),
((pSegmentArc->Flags & MILCoreSegFlags.SegSmoothJoin) != 0));
currentOffset += sizeof(MIL_SEGMENT_ARC);
}
break;
case MIL_SEGMENT_TYPE.MilSegmentPolyLine:
case MIL_SEGMENT_TYPE.MilSegmentPolyBezier:
case MIL_SEGMENT_TYPE.MilSegmentPolyQuadraticBezier:
{
// We only expect well-formed data, but we should assert that we're not reading too much data.
Debug.Assert(pathData.SerializedData.Length >= currentOffset + sizeof(MIL_SEGMENT_POLY));
Debug.Assert(pathData.Size >= currentOffset + sizeof(MIL_SEGMENT_POLY));
MIL_SEGMENT_POLY *pSegmentPoly = (MIL_SEGMENT_POLY *)(pbData + currentOffset);
Debug.Assert(pSegmentPoly->Count <= Int32.MaxValue);
if (pSegmentPoly->Count > 0)
{
List <Point> points = new List <Point>((int)pSegmentPoly->Count);
// We only expect well-formed data, but we should assert that we're not reading too much data.
Debug.Assert(pathData.SerializedData.Length >=
currentOffset +
sizeof(MIL_SEGMENT_POLY) +
(int)pSegmentPoly->Count * sizeof(Point));
Debug.Assert(pathData.Size >=
currentOffset +
sizeof(MIL_SEGMENT_POLY) +
(int)pSegmentPoly->Count * sizeof(Point));
Point *pPoint = (Point *)(pbData + currentOffset + sizeof(MIL_SEGMENT_POLY));
for (uint k = 0; k < pSegmentPoly->Count; k++)
{
points.Add(*pPoint);
pPoint++;
}
switch (pSegment->Type)
{
case MIL_SEGMENT_TYPE.MilSegmentPolyLine:
ctx.PolyLineTo(points,
((pSegmentPoly->Flags & MILCoreSegFlags.SegIsAGap) == 0),
((pSegmentPoly->Flags & MILCoreSegFlags.SegSmoothJoin) != 0));
break;
case MIL_SEGMENT_TYPE.MilSegmentPolyBezier:
ctx.PolyBezierTo(points,
((pSegmentPoly->Flags & MILCoreSegFlags.SegIsAGap) == 0),
((pSegmentPoly->Flags & MILCoreSegFlags.SegSmoothJoin) != 0));
break;
case MIL_SEGMENT_TYPE.MilSegmentPolyQuadraticBezier:
ctx.PolyQuadraticBezierTo(points,
((pSegmentPoly->Flags & MILCoreSegFlags.SegIsAGap) == 0),
((pSegmentPoly->Flags & MILCoreSegFlags.SegSmoothJoin) != 0));
break;
}
}
currentOffset += sizeof(MIL_SEGMENT_POLY) + (int)pSegmentPoly->Count * sizeof(Point);
}
break;
#if DEBUG
case MIL_SEGMENT_TYPE.MilSegmentNone:
throw new System.InvalidOperationException();
default:
throw new System.InvalidOperationException();
#endif
}
}
}
}
}
}
}
}
private unsafe int GetFigureSize(byte *pbPathData)
{
MIL_PATHGEOMETRY *pPathGeometryData = (MIL_PATHGEOMETRY *)pbPathData;
return(pPathGeometryData == null ? 0 : (int)pPathGeometryData->Size);
}
